Update: AITA if I go no contact with my stepmother and stepsister after my bio father's death
I found out the day after the post from Jacqueline that the funeral already happened. Jacqueline, Jack, Jill, and I weren't invited. I deleted Fiona and Hal (Fiona has access to it) off Facebook after I found out and I didn't have Marguerite on Facebook. I deleted Fiona off my kids as well. I haven't blocked either yet. I just hope they will choose not to contact me.
Today I posted on Facebook letting the rest of the family I have on there know he passed. Fiona didn't give me the courtesy of inviting me/us to the funeral. I'm not giving her the courtesy of not telling his family.
Edit: I'm also writing a letter to my bio father and plan to burn it.